<?php
$uri = parse_url($_SERVER['REQUEST_URI']??'/',PHP_URL_PATH);
$links = [
    ['/clientes/cadastro','Cadastro'],
    ['/clientes/frequencia','Frequência'],
    ['/clientes/inadimplentes','Inadimplentes'],
    ['/clientes/ticket-medio','Ticket por Cliente'],
];
?>
<div class="pbi-submenu mb-3">
<?php foreach($links as [$href,$lbl]): $a=($uri===$href)?'ativo':''; ?>
    <a href="<?= $href ?>" class="pbi-submenu-link <?= $a ?>"><?= $lbl ?></a>
<?php endforeach; ?>
</div>
